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(in English) OSPF is a popular routing protocol in the Internet. OSPF cause traffic congestion at nodes where heavy traffics concentrate. It can't be avoided dynamically, even if there is room in the path of other. We proposed routing method using by available bandwidth. Number of hops increases in the proposed method, when traffic is heavy. This report proposes a method which is applied to high-priority traffic. Simulations show that the proposed method has higher throughput than OSPF. Simulation result, the proposed method can be up to 50% to allow the high-priority traffic in the traffic of the entire network.